Specifications

Glossary-25
TTLSsupportsauthenticationmethodsdefinedbyEAP,aswellastheolderChallengeHandshake
AuthenticationProtocol(CHAP),PasswordAuthenticationProtocol(PAP),MicrosoftCHAP(MS‐
CHAP),andMS‐CHAPV2.CompareEAP‐TLS;PEAP.
Tunneled Transport Layer Security subprotocol
SeeTTLS.
tunneling
Thetransmissionofdatabyonenetworkthroughtheconnectionsofanothernetworkby
encapsulatingitsdataandprotocolinformationwithintheothernetwork’stransmissionunits.To
forwardtrafficforaroaminguserwithinaMobilityDomain™group,aRoamA boutSwitchthatis
notamemberoftheuser’svirtual LAN
(VLAN)createsa tunneltoanotherRoamAboutSwitchon
whichtheuser’sVLANisconfigured.
Type, Length, and Value
SeeTLV.
U-NII
UnlicensedNationalInformationInfrastructure.Threeunlicensedfrequencybandsof100 MHz
eachinthe5GHzband,designatedbytheU.S.FederalCommunicationsCommission(FCC)to
providehigh‐speedwirelessnetworking.Thethreefrequencybands—5.15 GHzthrough5.25 GHz
(forindooruseonly),5.25 GHzthrough5.35 GHz,and5.725 GHzthrough5.825 GHz—were
allocatedin1997.
Unlicensed National Information Infrastructure
SeeU‐NII.
user
Apersonwhousesaclient.InanEnterasysNetworksMobilitySystem,usersareindexedby
usernameandassociatedwithauthorizationattributessuchasusergroupmembership.
user glob
Anamingconventionformatchingfullyqualifiedstructuredusernamesorsetsofusernames
duringauthenticationbymeans ofknown charactersplustwospecial“wildcard”characters.
Doubleasterisks(**)representallusernames.Asingleasterisk(*)canappeareitherbeforeorafter
thedelimiterinauserglobandcanrepresentany
numberofcharactersuptothenextdelimiter.A
delimitercanbeanat(@)signoradot(.).SeealsoMACaddressglob;VLANglob.
user group
Acollectionofuserswiththesameauthorizationattributes.
Vendor-Specific Attribute
SeeVSA.
Virtual LAN
SeeVLAN.
VLAN
VirtualLAN.AsetofportsthatshareasingleLayer 2network.Becausetheportsthatconstitutea
VLANcanbeonasinglenetworkdeviceormultipledevices,VLANsenableyoutopartitiona
physicalnetworkintologicalnetworksthatmeettheneedsofyourorganization.